Operational since 1976, Texas Steel Conversion Inc. has been one of the largest commercial heat-treating companies in the world. It is a global leader in the processing of oil country tubular goods (OCTG) and the manufacturing of drill pipe. Located in Houston, Texas, the firm offers an array of products, such as premium tubing, EUE (external upset ends)/API (American Petroleum Institute) tubing, casing, mechanical tubing and drill pipe. Services offered include forging, heat treating, inspection, as well as threading.